Peter Christian Hersleb Kjerschow Michelsen, better known as Christian Michelsen, was a Norwegian shipping magnate and statesman. He was the first prime minister of independent Norway and Norway's 9th prime minister from 1905 to 1907. Michelsen is most known for his central role in the dissolution of the union between Norway and Sweden in 1905, and was one of Norway's most influential politicians of his time.

The dissolution of the union between the kingdoms of Norway and Sweden under the House of Bernadotte, was set in motion by a resolution of the Storting on 7 June 1905. Following some months of tension and fear of an outbreak of war between the neighbouring kingdoms – and a Norwegian plebiscite held on 13 August which overwhelmingly backed dissolution – negotiations between the two governments led to Sweden's recognition of Norway as an independent constitutional monarchy on 26 October 1905. On that date, King Oscar II renounced his claim to the Norwegian throne, effectively dissolving the United Kingdoms of Sweden and Norway, and this event was swiftly followed, on 18 November, by the accession to the Norwegian throne of Prince Carl of Denmark, taking the name of Haakon VII.